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Biology Lessons 5.2

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Biology Lessons 5.2

  1. 1. Lesson 5.2 Classification of PlantsPlants can be classified as non-vascularor vascular.Non-vascular  lack xylem and phloem depend on diffusion to transport nutrients, water and sugars. will grow low to the ground includes liverworts, hornworts, and mosses reproduce by spores or asexually
  2. 2. Non-vascular plantsmoss liverworts hornworts
  3. 3. Classification of PlantsVascular have xylem and phloem to carry water, nutrients and sugars can grow tall includes pines, oaks, and ferns further divided by how they reproduce
  4. 4. Classification of Plants further divided by how they reproduce Spores vs. seeds:Ex. Ferns reproduce by spores
  5. 5. Classification of PlantsVascular plants that produce seeds canfurther be divided based on whether ornot the seeds are produced in cones orflowers:1. Gymnosperms: have seedsin cones or cone-like structuresMeans “naked seed” – no ovarydevelopes around seed
  6. 6. Classification of PlantsVascular plants that produce seeds can further be divided based on whether or notthe seeds are produced in cones or flowers:1. Gymnosperms: have seedsin cones2. Angiosperms: have seedsin flowers
  7. 7. Classification of Plants•Gymnosperms:Three types of gymnosperms: 1. Coniferslargest specimens includes pines, spruce, evergreenshave two types of cones:  Staminate or pollen cone (sperm)  Ovulate or seed cone (egg)
  8. 8. Pollen goes from staminate cone to ovulate cone where egg is fertilizedStaminate or Ovulate orpollen cone seed cone
  9. 9. Classification of Plants•Gymnosperms:Three types of gymnosperms: 1. Conifers2. Cycads few species alive today; know in past plentiful from fossil record palm like trees in subtropics and tropics
  10. 10. Cycad
  11. 11. Classification of Plants•Gymnosperms:Three types of gymnosperms: 1. Conifers – largest specimens, includes pines, spruce, evergreens 2. Cycads 3. Ginkgo trees only tree of its kind looses leaves unlike conifers and cycadsLeaves are two-lobed & fan-shapedNative to orientOrnamental – found in parks, etc.
  12. 12. Ginkgo

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